AK-CC 550
Manual RS8EN502 © Danfoss 02-2010
21
Digital input signal - D2
The controller has a digital input 2 which can be used for one of the following func-
tions:
Off: The input is not used.
1) Status display of a contact function
2
) Door function. When the input is open it signals that the door is open. The refrig
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eration and the fans are stopped. When the time setting in “A04” is passed, an alarm
will be given and refrigeration resumed. (o89).
3) Door alarm. When the input is open it signals that the door is open. When the time
setting in “A04” is passed an alarm will be given.
4) Defrost. The function is started with a pulse signal.
The controller will register when
the DI input is activated. The controller will then start a defrost cycle. If the signal
is to be received by several controllers it is important that ALL connections are
mounted the same way (DI to DI and GND to GND).
5) Main switch.
Regulation is carried out when the input is short-circuited, and regula-
tion is stopped when the input is put in pos. OFF.
6) Night operation. When the input is short-circuited, there will be regulation for
night operation.
7) Thermostat band changeover. Switch to thermostat 2 (r21)
8) Separate alarm function. Alarm will be given when the input is short-circuited.
9) Separate alarm function. Alarm will be given when the input is opened.
10) Case cleaning. The function is started with a pulse signal. See also description on
page 5.
11) Forced refrigeration at hotgas defrost when the input is short-circuited.
12) Night blinds. When the input is short-circuited the night blinds will be activated.
13) The input is used for coordinated defrost in conjunction with other controllers of
the same type
o37
DI2 config.
Configuration of light function
1) Light is controlled via day/night status
2) Light is controlled via data communication and "Light remote o39"
3) Light is controlled by door contact, defined in either o02, o37 or o84 where the set
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ting is selected to either 2 or 3. When the door is opened the relay will cut in. When
the door is closed again there will be a time delay of two minutes before the light is
switched off.
4) As "2" but if there are any 15-minute network errors, the light will switch on and the
night blind will open.
o38
Light config
Activation of light relay
The light relay can be activated here, but only if defined in o38 with setting 2.
o39
Light remote
Rail heat during day operation
The ON period is set as a percentage of the time
o41
Railh.ON day%
Rail heat during night operation
The ON period is set as a percentage of the time
o42
Railh.ON ngt%
Rail heat cycle
The period of time for the aggregate ON time + OFF time is set in minutes
o43
Railh. cycle
Case cleaning
The status of the function can be followed here or the function can be started manu-
ally.
0 = Normal operation (no cleaning)
1 = Cleaning with fans operating. All other outputs are Off.
2 = Cleaning with stopped fans. All outputs are Off.
If the function is controlled by a signal at the DI1, DI2 or DI3 input, the relevant status
can be seen here in the menu.
o46
Case clean
Selection of application
The controller can be defined in various ways. Here you set which of the 10 applica
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tions is required. On page 12 you can see a survey of applications.
This menu can only be set when regulation is stopped, i.e. “r12” is set to 0.
o61
Appl. Mode
Transfer a set of pre-settings to the controller
An option exists to select quick settings for a number of parameters. This is based on
whether an appliance or a room needs to be controlled or whether the defrosting
must be stopped by time or by temperature. The overview can be seen on page 27.
This menu can only be set when the control is stopped, i.e. When "r12" is set at 0.
On setting the value will fall back to 0. A subsequent adjustment/setting of param
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eters can be carried out as required.
o62
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Access code 2 (Access to adjustments)
There is access to adjustments of values, but not to configuration settings. If the set
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tings in the controller are to be protected with an access code you can set a numeri-
cal value between 0 and 100. If not, you can cancel the function with setting 0. If the
function is used, access code 1 (o05)
must also be used.
o64
Acc. code 2
Save as factory setting
With this setting you save the controller’s actual settings as a new basic setting (the
earlier factory settings are overwritten).
o67
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